US 7,568,571 B2 · Conveyor device

Abstract

In order to suppress speed irregularity of step rollers (5) in a passenger conveyor, a bent section (17) is formed in a step guide rail (3) and a restraining member (18) is provided upstream thereof, the shape of the height of the bent section (17) and the restraining member (18) is corrected beforehand by the amount of the compression of resilient members of the step rollers (5), which are formed with such resilient members around their shafts, by the compressive force acting between the bent section (17) and restraining member (18). Thus generation of speed irregularity of the steps (4) is suppressed and passenger comfort is improved. Also, by providing a recess (3aa) in the step guide rail (3), gripping of the step rollers (5) as they execute rolling movement along the undersurface of the restraining member (18) from below can be avoided, thereby preventing damage to the step rollers (5), restraining member (18) and step guide rail (3).

Claims20

Dependent claims

A conveyor having

a plurality of steps having a step roller,
a step chain linking said step rollers with a prescribed pitch,
a rotary drive device that generates a drive force for moving said steps in a prescribed direction, and
a driving sprocket wheel rotated by receiving said drive force of said rotary drive device, and that transmits said drive force to said step chain,
said conveyor comprising:
a step guide rail whereby, if a pitch circle speed of said driving sprocket wheel is defined as Vt, an average speed of said step roller that is moved, linked with said step chain is defined as Vo, and positions at which a speed of said step roller decreases from Vt to Vo are defined as reference positions, said step rollers are guided by providing a hill-shaped bent section between a reference position, of a plurality of said reference positions that exist, positioned in a vicinity of said driving sprocket wheel and another reference position adjacent to said reference position;
and
a restraining member provided so as to abut said step roller in a position facing a position upstream of a location where said hill-shaped bent section is provided;
wherein said step rollers are formed having a resilient member about a shaft and said step guide rail is formed with a height of a central region of said hill-shaped bent section elevated by an amount corresponding to an amount of compression of said resilient member of said step roller in a radial direction.

6 more elements

A conveyor having

a plurality of steps having a step roller,
a step chain linking said step rollers with a prescribed pitch,
a rotary drive device that generates a drive force for moving said steps in a prescribed direction,
a driving sprocket wheel rotated by receiving said drive force of said rotary drive device, and that transmits said drive force to said step chain,
said conveyor comprising:
a step guide rail whereby, if a pitch circle speed of said driving sprocket wheel is defined as Vt, an average speed of said step roller that is moved, linked with said step chain is defined as Vo, and positions at which a speed of said step roller decreases from Vt to Vo are defined as reference positions, said step rollers are guided by providing a hill-shaped bent section between a reference position, of a plurality of said reference positions that exist, positioned in a vicinity of said driving sprocket wheel and another reference position adjacent to said reference position;
and
a restraining member provided so as to abut said step roller in a position facing a position upstream of a location where said hill-shaped bent section is provided;
wherein said step guide rail is formed with a recess in a surface facing said restraining member.

6 more elements

A conveyor having

a plurality of steps having a step roller,
a step chain linking said step rollers with a prescribed pitch,
a rotary drive device that generates a drive force for moving said steps in a prescribed direction,
a driving sprocket wheel rotated by receiving said drive force of said rotary drive device, and that transmits said drive force to said step chain;
said conveyor comprising:
a step guide rail whereby, if a pitch circle speed of said driving sprocket wheel is defined as Vt, an average speed of said step roller that is moved, linked with said step chain is defined as Vo, and positions at which a speed of said step roller decreases from Vt to Vo are defined as reference positions, said step rollers are guided by providing a valley-shaped bent section between a reference position, of a plurality of said reference positions that exist, positioned in a vicinity of said driving sprocket wheel and another reference position adjacent to said reference position;
and
a restraining member provided so as to abut said step roller in a position facing said valley-shaped bent section;
wherein said step guide rail is formed with a recess in said valley-shaped bent section.

6 more elements

Dependencies are inferred from the claim text.

Conveyor device

Life of this patent

Conveyor device

Life of this patent

Abstract

Claims20